Cupola-charging door



- 1,531,364 B. H. WHITING CUPOLA CHARGING DOOR Filed April 14, 1923 2 Sheets-Sheet 1 March 31, 1925.

B. H. WHITING CUPOLA CHARGING DOOR Filed April 14, 1923 2 Sheets-Sheet 2 nism of this invention in its Patented Mar. 31, 1925.

BRADFORD inner H. WHITING, OF CHICAGO, ILLINOIS. ASSIGNOR TO 'WHITING CORPORA:

TION, O1 HARVEY, ILLINOIS,

A CORPORATION 035 ILLINOIS.

onroLA-onAnerNe noon.

Application filed April 14, 1923.

To all ioizom may concern:

Be it known that I. BRADFORD l-l. WHIT- ING, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented a certain new and useful Improvement in Cupola-Uharging Doors. of which the following is a specification.

This invention relates to cupola furnaces for meltin metals of various sorts. -The object of the invention is to provide a door for the metal intake opening of such a char acter that the operator outside the cupola can view the interior thereof in comparative comfort, notwithstanding the intense heat of the cupola; can insert a poker or the like for stirring up the contents the cupoia and through which material for combustion in the furnace may be inserted with the minimum outward passage of. heat from the interior of the cupola. The further object is to provide a convenient mounting for the door by which it may be moved to different positions as the work in and about the cupola may require.

The invention consists in means capable of attaining the foregoing and other objects; which can be easily and cheaply made; which is satisfactory in use and is not readily liable to get out of order.

More particularly, the invention consists in numerous features and details of con-- struction which will be hereafter more fully set forth in the specification and claims.

Referring to the drawings in which like numerals designate the same parts throughout the several views- V Figure 1 is a fragmentary side elevation of a cupola furnace equipped with mechapreferred form, showing a conventional form of device for passing the contents of a charging car. into the cupola.

Figure 2 is a plan view Figure 1.

Figure 3 is a side elevation taken from the left of Figure 1 showing the door mechanism of this invention.

Figure 4 is a central, sectional detail view through the cupola and door of this inven-. tion, taken on the line 4-4 of Figure 3.

Figure 5 is a plan detail vi w on the irregular line 5-5 of Figure 3.'

The improved door is shown applied to a conventional form of cylindrical cupola on the line 2-2 of 7 cylinder 32 attached as and curtain of chains Serial No. 632,047.

having the usual intake port 12 with an in clined bottom edge 14 over which material delivered in any stance, from a car 16 is adapted to be passed. In Figure 1, the wheels 18 of the car are shown mounted upon aconventional form of tilting mechanism 20-22 adapted to move the car from the posit-ion shown to an inclined position where the contents of the car will slide over port opening 14 into the cupola. The complete operative mechanism for so tilting the car is shown, in Patent No. 91 February 9., 1909.

Any 'cupola or furnace which thus handles material in car load lots necessarily re quiresin the cupola an intense heat and the problem to be solved by this invention is to provide a practical closure for the. port 12 through which an operator stationed adjacent to this port can view the contents, and through which at least small quantities of outside material may be passed into the'furnace without completely opening the'large port 12 and thus allowing the heat in the furnace to flare out into the furnace room. The desired result is accomplished by placingon opposite vertical sides of the port 12 trackways or guides 24 for a vertically reciprocable cross-head 26 carrying a multiplicity of parallel depending chains, 28 forming in the position of Figures 1, 3 and 4, a curtain completely covering the 1 port 12. This cross-head 26 is vertically reciprocable in the track device 24 by any suitable means,- as, for instance, a piston rod 30 entering and operatively controlled by an air 1,725 to J. Hyslop, dated terror walls of the cupola. Conventional means, not shown, is provided for admitting compressed air tothis cylinder below the piston 36 on rod 30 to in conventional manner elevate the iston and consequently'the cross-head 26 and the suspended curtain of chains 28. In the construction shown in the drawings, it is assumed that the weight of the cross-head will always carry the curtain down to the position shown in the drawings when the motive fluid is allowed to escape from bel w piston 36 in cylinder 32, butmotive fluid may also be conveniently applied to the upper end of cylinder 30 above piston 36 to downward should occasion ever' require it.

at 34 to the ex move the cross-head suitable manner, as for 'infor instance,

or othermotive fluid tain except for 'necessarily present atthe junctures of the "new the interior when it becomes necessary insert a poker various chain lengths In actual practice,

*these small openings through the curtaiir areof suliicientsize so that the operator can of the cupola Without any objectionable amount of heat passing through the curtain to the furnaceroom. for the operator to stir up the contents otthecupoleuhe can or the like through the cur tain at any desired point the adjacent chain purpose, and yet in this case,

tion shown and the passage of swinging aside as may he required for this the opening through the curtain Will be so comparatively small that'no objectionable amountrof heat will escape through the curtain. When a carload. of material is to he: charged in the cupola; the curtain may be left in the posithe material "down'the inclined surface 14 be relied upon to simply swing the curt-am inward tov the rightas viewed in Figure l, sufficiently to allow the material to pass, or the operator can manipulate cylinder 32 to elevate the cross-head 26 and consequently the entire curtain to such a height that the chains 28 ot the curtain'entirely clear the port 12.

The mechanism of this invention has been incorporated in a commercial structure which actually produces the desired satisfactory results heretofore enumerated. Y

Having thus described my invention, What I claim as new and desire to secure by Lettei's Patent is: V i p The combination with a cupola having a side port the lower defining'wjall of which is inclined downwardly towards the interior of the cupolayof a curtain for closing said port composed of a multiplicity placed, loosely hanging chains suspended from their tops only free lower ends With said inclined'lowcr defining Wall of said port, whereby said port is closed normally by "said curtain and whereby fuel deposited on said inclined Wall.

will flow under said curtain Without the necessity of manually manipulating latter. 7

In Witness whereof, I'h'ave hereuntosuhscribed my name.

BRADFORD H. WHITING.

of closely the a and contacting at their" 

